datasheetbank_Logo   Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site
Part Name :   

ADC0803MDC View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
ADC0803MDC 8-Bit µP Compatible A/D Converters National-Semiconductor
National ->Texas Instruments National-Semiconductor
ADC0803MDC Datasheet PDF : 41 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
Functional Description (Continued)
Figure 2 shows a worst case error plot for the ADC0801. All
center-valued inputs are guaranteed to produce the correct
output codes and the adjacent risers are guaranteed to be
no closer to the center-value points than ±14 LSB. In other
words, if we apply an analog input equal to the center-value
±14 LSB, we guarantee that the A/D will produce the correct
digital code. The maximum range of the position of the code
transition is indicated by the horizontal arrow and it is guar-
anteed to be no more than 12 LSB.
The error curve of Figure 3 shows a worst case error plot for
the ADC0802. Here we guarantee that if we apply an analog
input equal to the LSB analog voltage center-value the A/D
will produce the correct digital code.
Transfer Function
Next to each transfer function is shown the corresponding
error plot. Many people may be more familiar with error plots
than transfer functions. The analog input voltage to the A/D
is provided by either a linear ramp or by the discrete output
steps of a high resolution DAC. Notice that the error is con-
tinuously displayed and includes the quantization uncertainty
of the A/D. For example the error at point 1 of Figure 1 is +12
LSB because the digital code appeared 12 LSB in advance
of the center-value of the tread. The error plots always have
a constant negative slope and the abrupt upside steps are
always 1 LSB in magnitude.
Error Plot
DS005671-81
FIGURE 1. Clarifying the Error Specs of an A/D Converter
Accuracy=±0 LSB: A Perfect A/D
Transfer Function
Error Plot
DS005671-82
DS005671-83
FIGURE 2. Clarifying the Error Specs of an A/D Converter
Accuracy=±14 LSB
DS005671-84
17
www.national.com
Direct download click here
 

Share Link : National-Semiconductor
All Rights Reserved © datasheetbank.com 2014 - 2019 [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]